Traditional horizontal sewage pumps commonly suffer from narrow flow passages prone to clogging, seal damage/leakage, poor corrosion resistance, and maintenance requiring pipe disassembly, significantly compromising operational stability & compliance in chemical/food/pharmaceutical/environmental harsh conditions.
This series resolves these challenges with dual-channel wide-passage impeller + dual mechanical seals + cantilever direct-coupled structure triple innovation, combined with optional stainless steel/medium-strength cast iron wetted parts, eliminating clogging/leakage & corrosion risks for high-efficiency, low-noise, acid/alkali corrosion-resistant long-term reliable operation.
Precisely deployed for chemical acid/alkali sewage, petroleum refining wastewater, light industry/food waste liquid, pharmaceutical process drainage, and environmental sewage treatment scenarios, supporting continuous transport across temperature <80℃, flow 10–125 m³/h, head 10–18 m, and media specific gravity ≤1.3.
Extended Service Life: Dual mechanical seals + SS/cast iron wetted parts resist wear & corrosion. Design lifespan ≥10 years—35% longer than standard pumps.
Energy Savings: High-efficiency hydraulic model (≥72% efficiency) + direct drive reduce annual electricity costs by 15–20%.
Lower Maintenance: Back-pull-out design enables seal/impeller inspection without pipe disconnection. Single technician completes maintenance in 1.5 hours, cutting labor costs by 45%.
Compact Design: Integrated pump-motor base reduces weight by ~20%, lowering floor load & lifting requirements.
Fast Installation: Pre-aligned coupling + optional discharge orientation enable zero-cutting pipe connection. Commissioning-ready within 2 hours—40% faster installation.
APPLICATIONS
Chemical Industry • Acid/alkali waste, organic solvents • Corrosion & wear resistant design
Petroleum & Refining • Refining wastewater, oily sewage • Cavitation & impact resistant
Food & Beverage • Food processing waste, brewing effluent • SS304/316 wetted parts, hygiene-compliant
Pharmaceutical & Environmental • Process drainage, sewage treatment • Low noise, cleanroom-compatible operation
MEDIA COMPATIBILITY
Temperature: <80°C • Media Type: Acidic / alkaline / corrosive sewage Solids: Suspended solids within standard limits • Specific Gravity: ≤1.3 Flow Range: 10–125 m³/h • Head Range: 10–18 m
Note: For special media (high viscosity, abrasive slurries, explosive conditions), please consult our engineering team for customized solutions.
Product Structure Diagram  | NO. | Component Name | NO. | Component Name |
| 1 | Casing Cover | 10 | Oil Level Indicator | |
| 2 | Pump Casing | 11 | Bearing Housing | |
| 3 | Impeller | 12 | Bearing Cover | |
| 4 | Seal Chamber | 13 | Key | |
| 5 | Seal Chamber | 14 | Spider | |
| 6 | Gasket | 15 | Shaft | |
| 7 | Shaft Sleeve (Not included in 4PW Series) | 16 | Nut | |
| 8 | Oil Seal | 17 | Gasket | |
| 9 | Bearing | 18 | Lip Seal / Radial Shaft Seal |
| NO. | Model | Flow Rate | Head | Speed | Power (kW) | ||
| m3/h | L/s | m | r/min | Shaft Power | Power | ||
| 1 | 50PW-65 50PWF-65 | 14.5 | 4 | 16 | 1440 | 2.47 | 4 |
| 2 | 50PW-65 50PWF-65 | 25 | 6.94 | 32 | 2900 | 3.35 | 4 |
| 3 | 80PW-100 80PWF-100 | 56 | 15.5 | 13.5 | 1440 | 4.1 | 5.5 |
| 4 | 80PW-100 80PWF-100 | 90 | 25 | 26 | 2900 | 7 | 11 |
| 5 | 100PW-125 100PWF-125 | 100 | 27.8 | 12.5 | 1440 | 5.7 | 7.5 |
| 6 | 21/2PW | 60 | 16.6 | 9.5 | 1440 | 2.5 | 4 |
| 7 | 21/2PW | 90 | 25 | 26 | 2920 | 11 | 15 |
| 8 | 21/2PW | 90 | 25 | 43 | 2940 | 17 | 22 |
| 9 | 4PW | 100 | 27.8 | 11 | 960 | 4.7 | 7.5 |
| 10 | 4PW | 160 | 44.4 | 25.5 | 1460 | 18 | 30 |
| 11 | 6PW | 300 | 83.3 | 14 | 980 | 17 | 30 |
| 12 | 6PW | 350 | 97 | 27 | 1450 | 42 | 55 |
| 13 | 8PW | 500 | 139 | 13 | 730 | 29 | 45 |
| 14 | 8PW | 550 | 153 | 25 | 980 | 59.5 | 75 |
| 15 | 10PW | 800 | 222 | 13.5 | 730 | 40.2 | 75 |
| 16 | 10PW | 1000 | 278 | 25 | 980 | 92 | 132 |
Media Requirements • Type: Acidic/alkaline/corrosive sewage with general suspended solids • Solids: No large particles or long fibers • Specific Gravity: ≤1.3 (please specify if >1.3 when ordering)
Temperature Limits • Media Temperature: <80°C • Ambient Temperature: ≤40°C
Electrical Limits • Power Supply: 3-phase 380V/50Hz (explosion-proof/special motors customizable) • Protection Rating: IP54 Drive Type: Coupling direct drive (belt drive optional)
Note: For special conditions (high temperature / strong corrosion / high solids / explosion-proof), please consult before selection. Customized solutions available.
National Standard Compliance: Strictly manufactured per GB/T 5657-2013 & relevant clauses of JB/T 5118-2010. Hydraulic performance & mechanical safety 100% compliant. Third-party full performance curve test reports available.
Material & Environmental Certification: Stainless steel wetted parts comply with RoHS/REACH directives. Medium-strength cast iron supplied with material certificates, ensuring zero heavy metal leaching risk.
International Quality System: ISO 9001:2015 certified. Core pressure-bearing components evaluated per CE/PED 2014/68/EU, meeting EU/US market entry requirements.
Factory Inspection Standard: Every unit undergoes 1.5× rated pressure hydrostatic test (5-min hold) + dynamic balance calibration + mechanical seal leakage test (<3 drops/min), guaranteeing zero-leakage delivery.
Fast Standard Delivery: Covers flow 10–125 m³/h, head 10–18 m. Standard medium-strength cast iron/304 stainless steel + dual mechanical seals. Technical confirmation & sample prototyping within 72 hours.
Deep Customization Capabilities:
Material Upgrade: Wetted parts optional in 316/duplex 2205 stainless steel or PTFE-lined for strong acids/alkalis, high-chloride, or ultra-pure media conditions.
Seals & Motors: Optional high-temp mechanical seals (up to 120℃), explosion-proof motors (Ex d IIB T4), IE4 ultra-efficiency or VFD-dedicated drives.
Structural Adaptation: Supports vertical/horizontal discharge switching, flange standard switching (GB/ANSI/DIN), belt drive customization, outdoor rain-proof canopy.
Intelligent Expansion: Pre-wired interfaces for pressure/temperature/dry-run sensors; supports integration with VFD cabinets, IoT remote monitoring, multi-pump rotation modules.
Please contact us for customization inquiries. Our engineering team delivers process proposals within 48 hours.
Installation Key Points:
1.Mount pump horizontally on solid base. Tighten anchor bolts symmetrically. Check levelness via pump outlet flange plane, allow wedge iron leveling. Ensure shaft horizontal deviation ≤0.05 mm/m.
2.Provide independent supports for inlet/outlet piping. Never use pump body as support. Install gate valve at outlet. Install debris screen at inlet to prevent large particles entry.
3.Maintain coupling gap per specification. Measure outer circle deviation ≤0.1 mm (up/down/left/right), end gap deviation ≤0.3 mm (full circle). Use thin shims to ensure pump-motor shaft concentricity.
4.Fill bearing box with thin oil to normal level line. Before initial startup, manually rotate shaft 3 turns to confirm smooth operation. Prime suction pipe & vent air. Jog test to verify rotation (clockwise from drive end).
Commissioning Process: Prime & vent → Close outlet gate valve → Start motor → Open pressure gauge cock → After reaching normal RPM, gradually open outlet valve → Record current/pressure/vibration/bearing temp data → Acceptance.
Request the “PW/PWF Horizontal Cantilever Centrifugal Sewage Pump Installation & Maintenance Manual” (PDF/English version) for complete dimensional drawings, assembly diagrams, and commissioning logs.
Q1: How does dual-channel impeller enable general suspended solids to pass smoothly?
Impeller features only two curved blades, creating wide, dead-zone-free flow passages. Combined with optimized volute design, tested general suspended solids pass smoothly, eliminating clogging risks.
Q2: How do dual mechanical seals achieve leakage <3 drops/min?
Dual-face series layout + oil-seal ring design, combined with spring constant-pressure compensation & thin oil lubrication. Tested leakage rate <3 drops/min, meeting industrial sewage requirements.
Q3: How does cantilever structure enable “maintenance without disconnecting pipes”?
After loosening pump body bolts, impeller + shaft seal assembly can be pulled out rearward as a unit. Seal rings/mechanical seals fully exposed for maintenance without disturbing inlet/outlet pipes.
Q4: How to select motor power when media specific gravity >1.3?
Standard motor selection based on specific gravity 1.3. For >1.3, shaft power increases proportionally. Specify actual specific gravity during ordering for recalculation & high-power motor selection.
Q5: How to handle bearing temperature exceeding 75℃?
Stop immediately & check: ① Oil level normal? (add oil if low / drain if high); ② Bearing worn? (replace bearing); ③ Cooling sufficient? (improve ventilation). Re-test after fault elimination.
